Modified tubular

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11230892
APP PUB NO 20210079740A1
SERIAL NO

17048068

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Importance

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Abstract

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A modified tubular, particularly a drill pipe (12) has a composite non-rotating drill pipe protector assembly (1) including first and second composite collars (2, 3) provided as cooperating parts positionable around the drill pipe (12) and bondable thereto using bonding agent, a non-rotating composite protector shell (4), provided as cooperating shell parts and an internal polymeric radial bearing (7) which fits within a recess (41) within the non-rotating composite protector shell (4) and has an internal surface (10) configured to provide a plurality of internal fluid flow channels (11). An external surface of the non-rotating composite protector shell (4) has blades (14), spaced apart by fluid flow by-pass channels (24). In use the rotation of the drill pipe facilitates fluid movement within the non-rotating composite protector shell by creating a pumping effect inducing ingress of fluid and through-flow within the internal polymeric radial bearing (7).

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Patent Owner(s)

Patent OwnerAddress
X-HOLDING GMBHPLANCKSTR 15 HERFORD D-32052

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baynham, Richard Ronald Marina di Ravenna, IT 12 67
Levie, David Elrick Yule Kastanienbaum, CH 1 3

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